
# name = input('请输入你的账号：')
# password = input('请输入你的密码：')
# print(name)
# print(password)
# print(type(name))
# print(type(password))

# print('100+200=',100+200)

# str1 = 'hello'
# str2 = 'world'
# print(str1+str2)

# str3 = 2
# str4 ='world'
# print(str3+str4)

# str5 = 'world'
# str6 = 5
# print(str5*str6)
 #第三天课程

#内存地址
# a = 5
# b = 5.0
# print(id(a))
# print(id(b))
# print(a == b)
# print(a is b)